This is a specific block embedded into the Baikal-T1 SoC, which isdedicated to detect APB-bus protocol errors and tune the peripheralaccess timeout. So the dts bindings implies that corresponding dtsnode would be equipped with "be,bt1-apb-ehb" compatible string, MMIOregion of registers space and of space with no device mapped,interrupts property and with an APB-reference clock handler.